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Type: Posts; User: Conrad Hoffman

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  1. It just doesn't look that bad other than being...

    It just doesn't look that bad other than being ugly. Lots of bearing area left. I'd stone it, clean the heck out of everything, and try it. Nothing to lose.
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    You might look into fumed silica. It's used to...

    You might look into fumed silica. It's used to improve the abrasion resistance of paints and a hundred other applications. Totally the opposite of salt grain size, which I would think will always...
  3. Start with a search of 4" schedule 40 steel pipe....

    Start with a search of 4" schedule 40 steel pipe. I think that's 4.5" OD. Should be a bunch of related fitting and stuff, though maybe hard to get. Or, just look at the various fittings in a well...
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    I've only done a limited amount of hardness...

    I've only done a limited amount of hardness testing but sample prep is crucial if you want any kind of accurate or even consistent answer. I'd cut the sample out any way you can, keeping it cool....
  5. Poll: One caution with rolled threads. They will have a...

    One caution with rolled threads. They will have a slight crease at the top of the thread and if assembly is done by the unskilled or the uncaring, it's easier to cross thread the fasteners because...
  6. As always, think of every possible thing that...

    As always, think of every possible thing that could break or go wrong. Figure out how not to be in the path of it, not even for a second. Edsel Murphy may not be with us but his law still lives.
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    I went mirrorless a while back, though I use...

    I went mirrorless a while back, though I use brand N. What you can do with these cameras is astounding and the video performance leaves little to be desired. Your still shot looks good- I'm mostly a...
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    Alas, there's no info on codes other than the...

    Alas, there's no info on codes other than the page I scanned. I also have a 1953 catalog but there's no code info at all! It's possible I missed it in the fine print, but I looked three times. They...
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    I've got a couple ND catalogs with the bearing in...

    I've got a couple ND catalogs with the bearing in two of them, but a code page in only one, the May 1943 16th edition. The code page doesn't have everything in your part number, but at least it's...
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    That mill would be great fun to have but I bet it...

    That mill would be great fun to have but I bet it would collapse my garage floor and drop straight to China. What, 5000-10,000 lbs?
  11. In 46 years of working with electromechanical...

    In 46 years of working with electromechanical stuff, I've yet to see or need a #10-24. Everything has been #10-32. I'd be surprised if I even owned a #10-24 tap and I certainly couldn't come up with...
  12. Armchair guess, but I'd think if you bored...

    Armchair guess, but I'd think if you bored carefully almost to size, then honed very little, it would come out quite round. Hone a lot and you probably get an egg. OTOH, with the right honing tool it...
  13. Which reminds me of my favorite movie quote from...

    Which reminds me of my favorite movie quote from King Ralph with John Goodman. "Spotted dick... Dick of what?"
  14. Igus has some interesting solutions but nothing...

    Igus has some interesting solutions but nothing will be as low friction as good ball bearings. https://www.igus.com/info/drylin-linear-guides-overview
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    I keep a little squirt bottle of way oil handy...

    I keep a little squirt bottle of way oil handy and add a little before and behind when I'm going to be sliding it.
  16. Haven't done this in years and I worked on weird...

    Haven't done this in years and I worked on weird stuff, but my experience was that things tighten up. That's bad because you can burn valves. If you're working with shims like I was, I'd stay on the...
  17. I've used Future floor finish. Interesting info...

    I've used Future floor finish. Interesting info here- Don's Airbrush Tips - Future Floor Polish
    More here- The Complete Future
  18. The headstock chucks are very desirable and tend...

    The headstock chucks are very desirable and tend to sell for a good buck. That said, they're not that great. OK for some fast and rough work, but nothing of high precision. I've got one for my Logan...
  19. Well, true, but IMO there's the matter of pride...

    Well, true, but IMO there's the matter of pride and principle. Besides, one might want to lap a piece of metal flat at some point in the future and correcting a lapping plate that's more than a few...
  20. I don't know anything about lapping plastics, but...

    I don't know anything about lapping plastics, but I can imagine the grit will embed in the plastic and mostly lap the plate into a shape you don't want. The rings are what fix that, if they can keep...
  21. We have a 12" Lapmaster at work, but I built a...

    We have a 12" Lapmaster at work, but I built a small one for home. You can probably find cast plumbing fittings at a good hardware store. Face the end and Bob's your uncle. Note that the factory ones...
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    Yeah, that would be a joint of last resort for...

    Yeah, that would be a joint of last resort for disassembly. Get some help to move it with the table off. If it's on a sheet metal cabinet, remember that it will be top heavy. Get it off the cabinet...
  23. I keep oil and air hardening around. The air...

    I keep oil and air hardening around. The air hardening is the most handy, but also tends to be more expensive. Don't forget tempering unless you want your parts to break.
  24. Think about where the financial news for most...

    Think about where the financial news for most (all?) newspapers comes from. Yep, pressers. You're getting the story right from the people with a vested interest in it. You'll rarely see deeper...
  25. I worked for a place that had a Teflon 612 and it...

    I worked for a place that had a Teflon 612 and it was just fine. "Average upkeep" can be all over the map, but they seems to hold up with only moderate attention to upkeep. We had the cable drive,...
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